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O. A. J. SJOBERG. Window-Screen Frame.

No. 220,095. Patented Sept. 30,1879.

IIIIIIIIIIIJIIlIl/Illlll CARL A. J. SJOBERG, OF 'BRIDGEPGRT,UONhlEOTIGUT, ASSIGNORQQF ONE- HALF OF HIS RIGHT TO THEODORE H.QUITTMEYER, OF SAMEPLAOE.

I lM-P 'R ONEMzENT tlN wmaovv s GREEN F RA M ES.

Specification forming part of Letters Patent No. 2203095, datedSeptember 30, 1879; application filed A June 18, 1879.

To all whom tt may concern: v

Be it known that I, CARL ADOLPH JOHAN SJOBERG, ofBridgeport, in thecounty of Fairtield and State of Connecticut, have invented certain newand useful Improvements in Window-Screen Frames; and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings, making a part of thisspecification.

My invention relates to certain improvements in the construction ofwindow-screen frames.

It has for its object to provide a ready means for attaching themosquito-netting to the frame, and also vertical and lateral adjustmentof the frame, in order that it may be made available for window-framesof varyin g widths and heights.

I am aware that many improvements have been suggested, having in viewmore particularly the lateral adjustment, and in some cases both lateraland vertical adjustment.

My invention consists of a rectangular frame, the bars of which consisteach of two pieces laid flatwise upon each other and rabbeted together,and adapted to slide longitudinally, being adjustably connected atbothends, the front piece of one bar and the rear piece of the adjacent barbeing permanently secured at the corners, the compound bars being thusformed affording reciprocal support, all as will be hereinafter setforth.; and

my invention further consists in forming a groove in the outside edgesof the frame, and arranging therein a series of sharppointed hooksadapted to pass through the meshes of the netting, and by which meansthe latter is secured to the frame, so that when desired it may bereadily removed and replaced, to accommodate itself to the variedadjustments of the frame, all as will be hereinafter more fully setforth.

In order that those skilled may know how to make and use myinvention 1will proceed to describe the same in detail, referring by lotters to theaccompanying drawings, in which- Figure 1 is a perspective view of aframe embodying the features of myinvention, with the corner portion ofthe netting shown in place and Fig. 2 is a detail view, in perspective,of the left-hand upper corner of "the frame disconnected, the upperhorizontal rail being turned over to show the corner-joint.

Similar letters indicate like parts in both views.

The frame is composed of four rails, each of which in turn is formed oftwo pieces, A A, rabbeted together, as clearly shown at Fig. 2, so as tobe capable of freely sliding longitudinally upon and guiding each other.The opposite ends of each of the pieces A A are slotted, as seen at B,and a screw, 0, passes through the said slots and a washer, D, and intothe other piece, so that by tightening the screw 0 the two parts may besecured firmly at any given adjustment. This adjustable fastening,employed at both ends of the bars, together with the rabbetedconnection, prevents all lateral play and ricketiness of the pieces, oneupon the other.

It will be observed that t in securing the pieces A A in their normalpositions the opposite ends are projected sufficiently to halve with orjoin the bars, to which they are to be secured by corner-screws E, toform a rectangular frame, the rabbets being so cut and joined at thecorners, as shown atFig. 2, to securely lock said corners in aright-angled position when the screws E are introduced.

Of course any other fastening device other than screws may be used-such,for instance, as wooden or metallic pegs, &c.

It will also be observed that as the parts A and A are laid flatwise oneach other, and adjustably connected at opposite ends, there is areciprocal support between them throughout their whole length to avoidwarping or springing, and that the outer edges of the two parts lie inthe same plane, thus securing a close joint with the window frame andsash.

The outer edges of the bars forming the frame are groovedlongitudinally, and within said grooves, at proper distances apart, arearranged a series of books, F, over which the mosquito-netting G ispassed. The grooves are deep enough to allow the exposed'ends of thehooks to lie within the outer plane of the bar-edges, so that they willnot come in con tact with the window or sash frames.

From this construction, as described, it is obvious that while the siderails or bars are firmly secured at the four corners they are capable oflongitudinal adjustment, and as they are secured in rectangularposition, such longitudinal adjustment of the bars will givelongitudinal and vertical adjustment to the frame as a structure.

As the two pieces A A are exactly alike, it will be observed that oneset of tools, or the same manipulation, will produce all the parts ofthe frame, thus rendering their production economical, which is a greatdesideratum. I of course do not wish to limit myself to the exact formof rabbet shown, as any other wellknown form, or an ordinarytonguc-ami-groove joint, may be used.

What I claim as new, and desire to secure by Letters Patent, is

1. The rectangular frame, the bars of which are composed of two parts, AA, laid flatwise on each other, and rabbeted together to affordreciprocal longitudinal support, adj ustably connected at both ends,- asdescribed, and permanently secured (A to A) at the four corners,substantially as and for the purpose set forth.

2. A rectangular frame provided with a groove in the exterior edges,said groove havin g located therein a series of hooks, substantially inthe manner and for the purposes set forth. 18gfitness my hand this 14thday of June,

CARL ADOLPH JOHAN SJOBERG.

In presence of- F. W. MARSH, MERWIN.

